drivers/net/ethernet/mellanox/mlx4/en_rx.c

   1 /*
   2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <net/busy_poll.h>
  35 #include <linux/mlx4/cq.h>
  36 #include <linux/slab.h>
  37 #include <linux/mlx4/qp.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/rculist.h>
  40 #include <linux/if_ether.h>
  41 #include <linux/if_vlan.h>
  42 #include <linux/vmalloc.h>
  43
  44 #include "mlx4_en.h"
  45
  46 static int mlx4_alloc_pages(struct mlx4_en_priv *priv,
  47                             struct mlx4_en_rx_alloc *page_alloc,
  48                             const struct mlx4_en_frag_info *frag_info,
  49                             gfp_t _gfp)
  50 {
  51         int order;
  52         struct page *page;
  53         dma_addr_t dma;
  54
  55         for (order = MLX4_EN_ALLOC_PREFER_ORDER; ;) {
  56                 gfp_t gfp = _gfp;
  57
  58                 if (order)
  59                         gfp |= __GFP_COMP | __GFP_NOWARN;
  60                 page = alloc_pages(gfp, order);
  61                 if (likely(page))
  62                         break;
  63                 if (--order < 0 ||
  64                     ((PAGE_SIZE << order) < frag_info->frag_size))
  65                         return -ENOMEM;
  66         }
  67         dma = dma_map_page(priv->ddev, page, 0, PAGE_SIZE << order,
  68                            PCI_DMA_FROMDEVICE);
  69         if (dma_mapping_error(priv->ddev, dma)) {
  70                 put_page(page);
  71                 return -ENOMEM;
  72         }
  73         page_alloc->page_size = PAGE_SIZE << order;
  74         page_alloc->page = page;
  75         page_alloc->dma = dma;
  76         page_alloc->page_offset = frag_info->frag_align;
  77         /* Not doing get_page() for each frag is a big win
  78          * on asymetric workloads.
  79          */
  80         atomic_set(&page->_count,
  81                    page_alloc->page_size / frag_info->frag_stride);
  82         return 0;
  83 }
  84
  85 static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
  86                                struct mlx4_en_rx_desc *rx_desc,
  87                                struct mlx4_en_rx_alloc *frags,
  88                                struct mlx4_en_rx_alloc *ring_alloc,
  89                                gfp_t gfp)
  90 {
  91         struct mlx4_en_rx_alloc page_alloc[MLX4_EN_MAX_RX_FRAGS];
  92         const struct mlx4_en_frag_info *frag_info;
  93         struct page *page;
  94         dma_addr_t dma;
  95         int i;
  96
  97         for (i = 0; i < priv->num_frags; i++) {
  98                 frag_info = &priv->frag_info[i];
  99                 page_alloc[i] = ring_alloc[i];
 100                 page_alloc[i].page_offset += frag_info->frag_stride;
 101
 102                 if (page_alloc[i].page_offset + frag_info->frag_stride <=
 103                     ring_alloc[i].page_size)
 104                         continue;
 105
 106                 if (mlx4_alloc_pages(priv, &page_alloc[i], frag_info, gfp))
 107                         goto out;
 108         }
 109
 110         for (i = 0; i < priv->num_frags; i++) {
 111                 frags[i] = ring_alloc[i];
 112                 dma = ring_alloc[i].dma + ring_alloc[i].page_offset;
 113                 ring_alloc[i] = page_alloc[i];
 114                 rx_desc->data[i].addr = cpu_to_be64(dma);
 115         }
 116
 117         return 0;
 118
 119 out:
 120         while (i--) {
 121                 frag_info = &priv->frag_info[i];
 122                 if (page_alloc[i].page != ring_alloc[i].page) {
 123                         dma_unmap_page(priv->ddev, page_alloc[i].dma,
 124                                 page_alloc[i].page_size, PCI_DMA_FROMDEVICE);
 125                         page = page_alloc[i].page;
 126                         atomic_set(&page->_count, 1);
 127                         put_page(page);
 128                 }
 129         }
 130         return -ENOMEM;
 131 }
 132
 133 static void mlx4_en_free_frag(struct mlx4_en_priv *priv,
 134                               struct mlx4_en_rx_alloc *frags,
 135                               int i)
 136 {
 137         const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 138         u32 next_frag_end = frags[i].page_offset + 2 * frag_info->frag_stride;
 139
 140
 141         if (next_frag_end > frags[i].page_size)
 142                 dma_unmap_page(priv->ddev, frags[i].dma, frags[i].page_size,
 143                                PCI_DMA_FROMDEVICE);
 144
 145         if (frags[i].page)
 146                 put_page(frags[i].page);
 147 }
 148
 149 static int mlx4_en_init_allocator(struct mlx4_en_priv *priv,
 150                                   struct mlx4_en_rx_ring *ring)
 151 {
 152         int i;
 153         struct mlx4_en_rx_alloc *page_alloc;
 154
 155         for (i = 0; i < priv->num_frags; i++) {
 156                 const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 157
 158                 if (mlx4_alloc_pages(priv, &ring->page_alloc[i],
 159                                      frag_info, GFP_KERNEL))
 160                         goto out;
 161         }
 162         return 0;
 163
 164 out:
 165         while (i--) {
 166                 struct page *page;
 167
 168                 page_alloc = &ring->page_alloc[i];
 169                 dma_unmap_page(priv->ddev, page_alloc->dma,
 170                                page_alloc->page_size, PCI_DMA_FROMDEVICE);
 171                 page = page_alloc->page;
 172                 atomic_set(&page->_count, 1);
 173                 put_page(page);
 174                 page_alloc->page = NULL;
 175         }
 176         return -ENOMEM;
 177 }
 178
 179 static void mlx4_en_destroy_allocator(struct mlx4_en_priv *priv,
 180                                       struct mlx4_en_rx_ring *ring)
 181 {
 182         struct mlx4_en_rx_alloc *page_alloc;
 183         int i;
 184
 185         for (i = 0; i < priv->num_frags; i++) {
 186                 const struct mlx4_en_frag_info *frag_info = &priv->frag_info[i];
 187
 188                 page_alloc = &ring->page_alloc[i];
 189                 en_dbg(DRV, priv, "Freeing allocator:%d count:%d\n",
 190                        i, page_count(page_alloc->page));
 191
 192                 dma_unmap_page(priv->ddev, page_alloc->dma,
 193                                 page_alloc->page_size, PCI_DMA_FROMDEVICE);
 194                 while (page_alloc->page_offset + frag_info->frag_stride <
 195                        page_alloc->page_size) {
 196                         put_page(page_alloc->page);
 197                         page_alloc->page_offset += frag_info->frag_stride;
 198                 }
 199                 page_alloc->page = NULL;
 200         }
 201 }
 202
 203 static void mlx4_en_init_rx_desc(struct mlx4_en_priv *priv,
 204                                  struct mlx4_en_rx_ring *ring, int index)
 205 {
 206         struct mlx4_en_rx_desc *rx_desc = ring->buf + ring->stride * index;
 207         int possible_frags;
 208         int i;
 209
 210         /* Set size and memtype fields */
 211         for (i = 0; i < priv->num_frags; i++) {
 212                 rx_desc->data[i].byte_count =
 213                         cpu_to_be32(priv->frag_info[i].frag_size);
 214                 rx_desc->data[i].lkey = cpu_to_be32(priv->mdev->mr.key);
 215         }
 216
 217         /* If the number of used fragments does not fill up the ring stride,
 218          * remaining (unused) fragments must be padded with null address/size
 219          * and a special memory key */
 220         possible_frags = (ring->stride - sizeof(struct mlx4_en_rx_desc)) / DS_SIZE;
 221         for (i = priv->num_frags; i < possible_frags; i++) {
 222                 rx_desc->data[i].byte_count = 0;
 223                 rx_desc->data[i].lkey = cpu_to_be32(MLX4_EN_MEMTYPE_PAD);
 224                 rx_desc->data[i].addr = 0;
 225         }
 226 }
 227
 228 static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
 229                                    struct mlx4_en_rx_ring *ring, int index,
 230                                    gfp_t gfp)
 231 {
 232         struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride);
 233         struct mlx4_en_rx_alloc *frags = ring->rx_info +
 234                                         (index << priv->log_rx_info);
 235
 236         return mlx4_en_alloc_frags(priv, rx_desc, frags, ring->page_alloc, gfp);
 237 }
 238
 239 static inline void mlx4_en_update_rx_prod_db(struct mlx4_en_rx_ring *ring)
 240 {
 241         *ring->wqres.db.db = cpu_to_be32(ring->prod & 0xffff);
 242 }
 243
 244 static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv,
 245                                  struct mlx4_en_rx_ring *ring,
 246                                  int index)
 247 {
 248         struct mlx4_en_rx_alloc *frags;
 249         int nr;
 250
 251         frags = ring->rx_info + (index << priv->log_rx_info);
 252         for (nr = 0; nr < priv->num_frags; nr++) {
 253                 en_dbg(DRV, priv, "Freeing fragment:%d\n", nr);
 254                 mlx4_en_free_frag(priv, frags, nr);
 255         }
 256 }
 257
 258 static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
 259 {
 260         struct mlx4_en_rx_ring *ring;
 261         int ring_ind;
 262         int buf_ind;
 263         int new_size;
 264
 265         for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
 266                 for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 267                         ring = priv->rx_ring[ring_ind];
 268
 269                         if (mlx4_en_prepare_rx_desc(priv, ring,
 270                                                     ring->actual_size,
 271                                                     GFP_KERNEL)) {
 272                                 if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) {
 273                                         en_err(priv, "Failed to allocate "
 274                                                      "enough rx buffers\n");
 275                                         return -ENOMEM;
 276                                 } else {
 277                                         new_size = rounddown_pow_of_two(ring->actual_size);
 278                                         en_warn(priv, "Only %d buffers allocated "
 279                                                       "reducing ring size to %d",
 280                                                 ring->actual_size, new_size);
 281                                         goto reduce_rings;
 282                                 }
 283                         }
 284                         ring->actual_size++;
 285                         ring->prod++;
 286                 }
 287         }
 288         return 0;
 289
 290 reduce_rings:
 291         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 292                 ring = priv->rx_ring[ring_ind];
 293                 while (ring->actual_size > new_size) {
 294                         ring->actual_size--;
 295                         ring->prod--;
 296                         mlx4_en_free_rx_desc(priv, ring, ring->actual_size);
 297                 }
 298         }
 299
 300         return 0;
 301 }
 302
 303 static void mlx4_en_free_rx_buf(struct mlx4_en_priv *priv,
 304                                 struct mlx4_en_rx_ring *ring)
 305 {
 306         int index;
 307
 308         en_dbg(DRV, priv, "Freeing Rx buf - cons:%d prod:%d\n",
 309                ring->cons, ring->prod);
 310
 311         /* Unmap and free Rx buffers */
 312         BUG_ON((u32) (ring->prod - ring->cons) > ring->actual_size);
 313         while (ring->cons != ring->prod) {
 314                 index = ring->cons & ring->size_mask;
 315                 en_dbg(DRV, priv, "Processing descriptor:%d\n", index);
 316                 mlx4_en_free_rx_desc(priv, ring, index);
 317                 ++ring->cons;
 318         }
 319 }
 320
 321 void mlx4_en_set_num_rx_rings(struct mlx4_en_dev *mdev)
 322 {
 323         int i;
 324         int num_of_eqs;
 325         struct mlx4_dev *dev = mdev->dev;
 326
 327         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
 328                 if (!dev->caps.comp_pool)
 329                         num_of_eqs = max_t(int, MIN_RX_RINGS,
 330                                            min_t(int,
 331                                                  dev->caps.num_comp_vectors,
 332                                                  DEF_RX_RINGS));
 333                 else
 334                         num_of_eqs = min_t(int, MAX_MSIX_P_PORT,
 335                                            dev->caps.comp_pool/
 336                                            dev->caps.num_ports) - 1;
 337
 338                 mdev->profile.prof[i].rx_ring_num =
 339                         rounddown_pow_of_two(num_of_eqs);
 340         }
 341 }
 342
 343 int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
 344                            struct mlx4_en_rx_ring **pring,
 345                            u32 size, u16 stride, int node)
 346 {
 347         struct mlx4_en_dev *mdev = priv->mdev;
 348         struct mlx4_en_rx_ring *ring;
 349         int err = -ENOMEM;
 350         int tmp;
 351
 352         ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, node);
 353         if (!ring) {
 354                 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
 355                 if (!ring) {
 356                         en_err(priv, "Failed to allocate RX ring structure\n");
 357                         return -ENOMEM;
 358                 }
 359         }
 360
 361         ring->prod = 0;
 362         ring->cons = 0;
 363         ring->size = size;
 364         ring->size_mask = size - 1;
 365         ring->stride = stride;
 366         ring->log_stride = ffs(ring->stride) - 1;
 367         ring->buf_size = ring->size * ring->stride + TXBB_SIZE;
 368
 369         tmp = size * roundup_pow_of_two(MLX4_EN_MAX_RX_FRAGS *
 370                                         sizeof(struct mlx4_en_rx_alloc));
 371         ring->rx_info = vmalloc_node(tmp, node);
 372         if (!ring->rx_info) {
 373                 ring->rx_info = vmalloc(tmp);
 374                 if (!ring->rx_info) {
 375                         err = -ENOMEM;
 376                         goto err_ring;
 377                 }
 378         }
 379
 380         en_dbg(DRV, priv, "Allocated rx_info ring at addr:%p size:%d\n",
 381                  ring->rx_info, tmp);
 382
 383         /* Allocate HW buffers on provided NUMA node */
 384         set_dev_node(&mdev->dev->pdev->dev, node);
 385         err = mlx4_alloc_hwq_res(mdev->dev, &ring->wqres,
 386                                  ring->buf_size, 2 * PAGE_SIZE);
 387         set_dev_node(&mdev->dev->pdev->dev, mdev->dev->numa_node);
 388         if (err)
 389                 goto err_info;
 390
 391         err = mlx4_en_map_buffer(&ring->wqres.buf);
 392         if (err) {
 393                 en_err(priv, "Failed to map RX buffer\n");
 394                 goto err_hwq;
 395         }
 396         ring->buf = ring->wqres.buf.direct.buf;
 397
 398         ring->hwtstamp_rx_filter = priv->hwtstamp_config.rx_filter;
 399
 400         *pring = ring;
 401         return 0;
 402
 403 err_hwq:
 404         mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size);
 405 err_info:
 406         vfree(ring->rx_info);
 407         ring->rx_info = NULL;
 408 err_ring:
 409         kfree(ring);
 410         *pring = NULL;
 411
 412         return err;
 413 }
 414
 415 int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
 416 {
 417         struct mlx4_en_rx_ring *ring;
 418         int i;
 419         int ring_ind;
 420         int err;
 421         int stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
 422                                         DS_SIZE * priv->num_frags);
 423
 424         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 425                 ring = priv->rx_ring[ring_ind];
 426
 427                 ring->prod = 0;
 428                 ring->cons = 0;
 429                 ring->actual_size = 0;
 430                 ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn;
 431
 432                 ring->stride = stride;
 433                 if (ring->stride <= TXBB_SIZE)
 434                         ring->buf += TXBB_SIZE;
 435
 436                 ring->log_stride = ffs(ring->stride) - 1;
 437                 ring->buf_size = ring->size * ring->stride;
 438
 439                 memset(ring->buf, 0, ring->buf_size);
 440                 mlx4_en_update_rx_prod_db(ring);
 441
 442                 /* Initialize all descriptors */
 443                 for (i = 0; i < ring->size; i++)
 444                         mlx4_en_init_rx_desc(priv, ring, i);
 445
 446                 /* Initialize page allocators */
 447                 err = mlx4_en_init_allocator(priv, ring);
 448                 if (err) {
 449                         en_err(priv, "Failed initializing ring allocator\n");
 450                         if (ring->stride <= TXBB_SIZE)
 451                                 ring->buf -= TXBB_SIZE;
 452                         ring_ind--;
 453                         goto err_allocator;
 454                 }
 455         }
 456         err = mlx4_en_fill_rx_buffers(priv);
 457         if (err)
 458                 goto err_buffers;
 459
 460         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
 461                 ring = priv->rx_ring[ring_ind];
 462
 463                 ring->size_mask = ring->actual_size - 1;
 464                 mlx4_en_update_rx_prod_db(ring);
 465         }
 466
 467         return 0;
 468
 469 err_buffers:
 470         for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++)
 471                 mlx4_en_free_rx_buf(priv, priv->rx_ring[ring_ind]);
 472
 473         ring_ind = priv->rx_ring_num - 1;
 474 err_allocator:
 475         while (ring_ind >= 0) {
 476                 if (priv->rx_ring[ring_ind]->stride <= TXBB_SIZE)
 477                         priv->rx_ring[ring_ind]->buf -= TXBB_SIZE;
 478                 mlx4_en_destroy_allocator(priv, priv->rx_ring[ring_ind]);
 479                 ring_ind--;
 480         }
 481         return err;
 482 }
 483
 484 void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
 485                              struct mlx4_en_rx_ring **pring,
 486                              u32 size, u16 stride)
 487 {
 488         struct mlx4_en_dev *mdev = priv->mdev;
 489         struct mlx4_en_rx_ring *ring = *pring;
 490
 491         mlx4_en_unmap_buffer(&ring->wqres.buf);
 492         mlx4_free_hwq_res(mdev->dev, &ring->wqres, size * stride + TXBB_SIZE);
 493         vfree(ring->rx_info);
 494         ring->rx_info = NULL;
 495         kfree(ring);
 496         *pring = NULL;
 497 #ifdef CONFIG_RFS_ACCEL
 498         mlx4_en_cleanup_filters(priv);
 499 #endif
 500 }
 501
 502 void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
 503                                 struct mlx4_en_rx_ring *ring)
 504 {
 505         mlx4_en_free_rx_buf(priv, ring);
 506         if (ring->stride <= TXBB_SIZE)
 507                 ring->buf -= TXBB_SIZE;
 508         mlx4_en_destroy_allocator(priv, ring);
 509 }
 510
 511
 512 static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv,
 513                                     struct mlx4_en_rx_desc *rx_desc,
 514                                     struct mlx4_en_rx_alloc *frags,
 515                                     struct sk_buff *skb,
 516                                     int length)
 517 {
 518         struct skb_frag_struct *skb_frags_rx = skb_shinfo(skb)->frags;
 519         struct mlx4_en_frag_info *frag_info;
 520         int nr;
 521         dma_addr_t dma;
 522
 523         /* Collect used fragments while replacing them in the HW descriptors */
 524         for (nr = 0; nr < priv->num_frags; nr++) {
 525                 frag_info = &priv->frag_info[nr];
 526                 if (length <= frag_info->frag_prefix_size)
 527                         break;
 528                 if (!frags[nr].page)
 529                         goto fail;
 530
 531                 dma = be64_to_cpu(rx_desc->data[nr].addr);
 532                 dma_sync_single_for_cpu(priv->ddev, dma, frag_info->frag_size,
 533                                         DMA_FROM_DEVICE);
 534
 535                 /* Save page reference in skb */
 536                 __skb_frag_set_page(&skb_frags_rx[nr], frags[nr].page);
 537                 skb_frag_size_set(&skb_frags_rx[nr], frag_info->frag_size);
 538                 skb_frags_rx[nr].page_offset = frags[nr].page_offset;
 539                 skb->truesize += frag_info->frag_stride;
 540                 frags[nr].page = NULL;
 541         }
 542         /* Adjust size of last fragment to match actual length */
 543         if (nr > 0)
 544                 skb_frag_size_set(&skb_frags_rx[nr - 1],
 545                         length - priv->frag_info[nr - 1].frag_prefix_size);
 546         return nr;
 547
 548 fail:
 549         while (nr > 0) {
 550                 nr--;
 551                 __skb_frag_unref(&skb_frags_rx[nr]);
 552         }
 553         return 0;
 554 }
 555
 556
 557 static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
 558                                       struct mlx4_en_rx_desc *rx_desc,
 559                                       struct mlx4_en_rx_alloc *frags,
 560                                       unsigned int length)
 561 {
 562         struct sk_buff *skb;
 563         void *va;
 564         int used_frags;
 565         dma_addr_t dma;
 566
 567         skb = netdev_alloc_skb(priv->dev, SMALL_PACKET_SIZE + NET_IP_ALIGN);
 568         if (!skb) {
 569                 en_dbg(RX_ERR, priv, "Failed allocating skb\n");
 570                 return NULL;
 571         }
 572         skb_reserve(skb, NET_IP_ALIGN);
 573         skb->len = length;
 574
 575         /* Get pointer to first fragment so we could copy the headers into the
 576          * (linear part of the) skb */
 577         va = page_address(frags[0].page) + frags[0].page_offset;
 578
 579         if (length <= SMALL_PACKET_SIZE) {
 580                 /* We are copying all relevant data to the skb - temporarily
 581                  * sync buffers for the copy */
 582                 dma = be64_to_cpu(rx_desc->data[0].addr);
 583                 dma_sync_single_for_cpu(priv->ddev, dma, length,
 584                                         DMA_FROM_DEVICE);
 585                 skb_copy_to_linear_data(skb, va, length);
 586                 skb->tail += length;
 587         } else {
 588                 /* Move relevant fragments to skb */
 589                 used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, frags,
 590                                                         skb, length);
 591                 if (unlikely(!used_frags)) {
 592                         kfree_skb(skb);
 593                         return NULL;
 594                 }
 595                 skb_shinfo(skb)->nr_frags = used_frags;
 596
 597                 /* Copy headers into the skb linear buffer */
 598                 memcpy(skb->data, va, HEADER_COPY_SIZE);
 599                 skb->tail += HEADER_COPY_SIZE;
 600
 601                 /* Skip headers in first fragment */
 602                 skb_shinfo(skb)->frags[0].page_offset += HEADER_COPY_SIZE;
 603
 604                 /* Adjust size of first fragment */
 605                 skb_frag_size_sub(&skb_shinfo(skb)->frags[0], HEADER_COPY_SIZE);
 606                 skb->data_len = length - HEADER_COPY_SIZE;
 607         }
 608         return skb;
 609 }
 610
 611 static void validate_loopback(struct mlx4_en_priv *priv, struct sk_buff *skb)
 612 {
 613         int i;
 614         int offset = ETH_HLEN;
 615
 616         for (i = 0; i < MLX4_LOOPBACK_TEST_PAYLOAD; i++, offset++) {
 617                 if (*(skb->data + offset) != (unsigned char) (i & 0xff))
 618                         goto out_loopback;
 619         }
 620         /* Loopback found */
 621         priv->loopback_ok = 1;
 622
 623 out_loopback:
 624         dev_kfree_skb_any(skb);
 625 }
 626
 627 static void mlx4_en_refill_rx_buffers(struct mlx4_en_priv *priv,
 628                                      struct mlx4_en_rx_ring *ring)
 629 {
 630         int index = ring->prod & ring->size_mask;
 631
 632         while ((u32) (ring->prod - ring->cons) < ring->actual_size) {
 633                 if (mlx4_en_prepare_rx_desc(priv, ring, index, GFP_ATOMIC))
 634                         break;
 635                 ring->prod++;
 636                 index = ring->prod & ring->size_mask;
 637         }
 638 }
 639
 640 int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
 641 {
 642         struct mlx4_en_priv *priv = netdev_priv(dev);
 643         struct mlx4_en_dev *mdev = priv->mdev;
 644         struct mlx4_cqe *cqe;
 645         struct mlx4_en_rx_ring *ring = priv->rx_ring[cq->ring];
 646         struct mlx4_en_rx_alloc *frags;
 647         struct mlx4_en_rx_desc *rx_desc;
 648         struct sk_buff *skb;
 649         int index;
 650         int nr;
 651         unsigned int length;
 652         int polled = 0;
 653         int ip_summed;
 654         int factor = priv->cqe_factor;
 655         u64 timestamp;
 656         bool l2_tunnel;
 657
 658         if (!priv->port_up)
 659                 return 0;
 660
 661         /* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx
 662          * descriptor offset can be deduced from the CQE index instead of
 663          * reading 'cqe->index' */
 664         index = cq->mcq.cons_index & ring->size_mask;
 665         cqe = &cq->buf[(index << factor) + factor];
 666
 667         /* Process all completed CQEs */
 668         while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK,
 669                     cq->mcq.cons_index & cq->size)) {
 670
 671                 frags = ring->rx_info + (index << priv->log_rx_info);
 672                 rx_desc = ring->buf + (index << ring->log_stride);
 673
 674                 /*
 675                  * make sure we read the CQE after we read the ownership bit
 676                  */
 677                 rmb();
 678
 679                 /* Drop packet on bad receive or bad checksum */
 680                 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
 681                                                 MLX4_CQE_OPCODE_ERROR)) {
 682                         en_err(priv, "CQE completed in error - vendor "
 683                                   "syndrom:%d syndrom:%d\n",
 684                                   ((struct mlx4_err_cqe *) cqe)->vendor_err_syndrome,
 685                                   ((struct mlx4_err_cqe *) cqe)->syndrome);
 686                         goto next;
 687                 }
 688                 if (unlikely(cqe->badfcs_enc & MLX4_CQE_BAD_FCS)) {
 689                         en_dbg(RX_ERR, priv, "Accepted frame with bad FCS\n");
 690                         goto next;
 691                 }
 692
 693                 /* Check if we need to drop the packet if SRIOV is not enabled
 694                  * and not performing the selftest or flb disabled
 695                  */
 696                 if (priv->flags & MLX4_EN_FLAG_RX_FILTER_NEEDED) {
 697                         struct ethhdr *ethh;
 698                         dma_addr_t dma;
 699                         /* Get pointer to first fragment since we haven't
 700                          * skb yet and cast it to ethhdr struct
 701                          */
 702                         dma = be64_to_cpu(rx_desc->data[0].addr);
 703                         dma_sync_single_for_cpu(priv->ddev, dma, sizeof(*ethh),
 704                                                 DMA_FROM_DEVICE);
 705                         ethh = (struct ethhdr *)(page_address(frags[0].page) +
 706                                                  frags[0].page_offset);
 707
 708                         if (is_multicast_ether_addr(ethh->h_dest)) {
 709                                 struct mlx4_mac_entry *entry;
 710                                 struct hlist_head *bucket;
 711                                 unsigned int mac_hash;
 712
 713                                 /* Drop the packet, since HW loopback-ed it */
 714                                 mac_hash = ethh->h_source[MLX4_EN_MAC_HASH_IDX];
 715                                 bucket = &priv->mac_hash[mac_hash];
 716                                 rcu_read_lock();
 717                                 hlist_for_each_entry_rcu(entry, bucket, hlist) {
 718                                         if (ether_addr_equal_64bits(entry->mac,
 719                                                                     ethh->h_source)) {
 720                                                 rcu_read_unlock();
 721                                                 goto next;
 722                                         }
 723                                 }
 724                                 rcu_read_unlock();
 725                         }
 726                 }
 727
 728                 /*
 729                  * Packet is OK - process it.
 730                  */
 731                 length = be32_to_cpu(cqe->byte_cnt);
 732                 length -= ring->fcs_del;
 733                 ring->bytes += length;
 734                 ring->packets++;
 735                 l2_tunnel = (dev->hw_enc_features & NETIF_F_RXCSUM) &&
 736                         (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_L2_TUNNEL));
 737
 738                 if (likely(dev->features & NETIF_F_RXCSUM)) {
 739                         if ((cqe->status & cpu_to_be16(MLX4_CQE_STATUS_IPOK)) &&
 740                             (cqe->checksum == cpu_to_be16(0xffff))) {
 741                                 ring->csum_ok++;
 742                                 /* This packet is eligible for GRO if it is:
 743                                  * - DIX Ethernet (type interpretation)
 744                                  * - TCP/IP (v4)
 745                                  * - without IP options
 746                                  * - not an IP fragment
 747                                  * - no LLS polling in progress
 748                                  */
 749                                 if (!mlx4_en_cq_busy_polling(cq) &&
 750                                     (dev->features & NETIF_F_GRO)) {
 751                                         struct sk_buff *gro_skb = napi_get_frags(&cq->napi);
 752                                         if (!gro_skb)
 753                                                 goto next;
 754
 755                                         nr = mlx4_en_complete_rx_desc(priv,
 756                                                 rx_desc, frags, gro_skb,
 757                                                 length);
 758                                         if (!nr)
 759                                                 goto next;
 760
 761                                         skb_shinfo(gro_skb)->nr_frags = nr;
 762                                         gro_skb->len = length;
 763                                         gro_skb->data_len = length;
 764                                         gro_skb->ip_summed = CHECKSUM_UNNECESSARY;
 765
 766                                         if (l2_tunnel)
 767                                                 gro_skb->encapsulation = 1;
 768                                         if ((cqe->vlan_my_qpn &
 769                                             cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK)) &&
 770                                             (dev->features & NETIF_F_HW_VLAN_CTAG_RX)) {
 771                                                 u16 vid = be16_to_cpu(cqe->sl_vid);
 772
 773                                                 __vlan_hwaccel_put_tag(gro_skb, htons(ETH_P_8021Q), vid);
 774                                         }
 775
 776                                         if (dev->features & NETIF_F_RXHASH)
 777                                                 skb_set_hash(gro_skb,
 778                                                              be32_to_cpu(cqe->immed_rss_invalid),
 779                                                              PKT_HASH_TYPE_L3);
 780
 781                                         skb_record_rx_queue(gro_skb, cq->ring);
 782
 783                                         if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) {
 784                                                 timestamp = mlx4_en_get_cqe_ts(cqe);
 785                                                 mlx4_en_fill_hwtstamps(mdev,
 786                                                                        skb_hwtstamps(gro_skb),
 787                                                                        timestamp);
 788                                         }
 789
 790                                         napi_gro_frags(&cq->napi);
 791                                         goto next;
 792                                 }
 793
 794                                 /* GRO not possible, complete processing here */
 795                                 ip_summed = CHECKSUM_UNNECESSARY;
 796                         } else {
 797                                 ip_summed = CHECKSUM_NONE;
 798                                 ring->csum_none++;
 799                         }
 800                 } else {
 801                         ip_summed = CHECKSUM_NONE;
 802                         ring->csum_none++;
 803                 }
 804
 805                 skb = mlx4_en_rx_skb(priv, rx_desc, frags, length);
 806                 if (!skb) {
 807                         priv->stats.rx_dropped++;
 808                         goto next;
 809                 }
 810
 811                 if (unlikely(priv->validate_loopback)) {
 812                         validate_loopback(priv, skb);
 813                         goto next;
 814                 }
 815
 816                 skb->ip_summed = ip_summed;
 817                 skb->protocol = eth_type_trans(skb, dev);
 818                 skb_record_rx_queue(skb, cq->ring);
 819
 820                 if (l2_tunnel)
 821                         skb->encapsulation = 1;
 822
 823                 if (dev->features & NETIF_F_RXHASH)
 824                         skb_set_hash(skb,
 825                                      be32_to_cpu(cqe->immed_rss_invalid),
 826                                      PKT_HASH_TYPE_L3);
 827
 828                 if ((be32_to_cpu(cqe->vlan_my_qpn) &
 829                     MLX4_CQE_VLAN_PRESENT_MASK) &&
 830                     (dev->features & NETIF_F_HW_VLAN_CTAG_RX))
 831                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(cqe->sl_vid));
 832
 833                 if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) {
 834                         timestamp = mlx4_en_get_cqe_ts(cqe);
 835                         mlx4_en_fill_hwtstamps(mdev, skb_hwtstamps(skb),
 836                                                timestamp);
 837                 }
 838
 839                 skb_mark_napi_id(skb, &cq->napi);
 840
 841                 if (!mlx4_en_cq_busy_polling(cq))
 842                         napi_gro_receive(&cq->napi, skb);
 843                 else
 844                         netif_receive_skb(skb);
 845
 846 next:
 847                 for (nr = 0; nr < priv->num_frags; nr++)
 848                         mlx4_en_free_frag(priv, frags, nr);
 849
 850                 ++cq->mcq.cons_index;
 851                 index = (cq->mcq.cons_index) & ring->size_mask;
 852                 cqe = &cq->buf[(index << factor) + factor];
 853                 if (++polled == budget)
 854                         goto out;
 855         }
 856
 857 out:
 858         AVG_PERF_COUNTER(priv->pstats.rx_coal_avg, polled);
 859         mlx4_cq_set_ci(&cq->mcq);
 860         wmb(); /* ensure HW sees CQ consumer before we post new buffers */
 861         ring->cons = cq->mcq.cons_index;
 862         mlx4_en_refill_rx_buffers(priv, ring);
 863         mlx4_en_update_rx_prod_db(ring);
 864         return polled;
 865 }
 866
 867
 868 void mlx4_en_rx_irq(struct mlx4_cq *mcq)
 869 {
 870         struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq);
 871         struct mlx4_en_priv *priv = netdev_priv(cq->dev);
 872
 873         if (priv->port_up)
 874                 napi_schedule(&cq->napi);
 875         else
 876                 mlx4_en_arm_cq(priv, cq);
 877 }
 878
 879 /* Rx CQ polling - called by NAPI */
 880 int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget)
 881 {
 882         struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi);
 883         struct net_device *dev = cq->dev;
 884         struct mlx4_en_priv *priv = netdev_priv(dev);
 885         int done;
 886
 887         if (!mlx4_en_cq_lock_napi(cq))
 888                 return budget;
 889
 890         done = mlx4_en_process_rx_cq(dev, cq, budget);
 891
 892         mlx4_en_cq_unlock_napi(cq);
 893
 894         /* If we used up all the quota - we're probably not done yet... */
 895         if (done == budget)
 896                 INC_PERF_COUNTER(priv->pstats.napi_quota);
 897         else {
 898                 /* Done for now */
 899                 napi_complete(napi);
 900                 mlx4_en_arm_cq(priv, cq);
 901         }
 902         return done;
 903 }
 904
 905 static const int frag_sizes[] = {
 906         FRAG_SZ0,
 907         FRAG_SZ1,
 908         FRAG_SZ2,
 909         FRAG_SZ3
 910 };
 911
 912 void mlx4_en_calc_rx_buf(struct net_device *dev)
 913 {
 914         struct mlx4_en_priv *priv = netdev_priv(dev);
 915         int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE;
 916         int buf_size = 0;
 917         int i = 0;
 918
 919         while (buf_size < eff_mtu) {
 920                 priv->frag_info[i].frag_size =
 921                         (eff_mtu > buf_size + frag_sizes[i]) ?
 922                                 frag_sizes[i] : eff_mtu - buf_size;
 923                 priv->frag_info[i].frag_prefix_size = buf_size;
 924                 if (!i) {
 925                         priv->frag_info[i].frag_align = NET_IP_ALIGN;
 926                         priv->frag_info[i].frag_stride =
 927                                 ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
 928                 } else {
 929                         priv->frag_info[i].frag_align = 0;
 930                         priv->frag_info[i].frag_stride =
 931                                 ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
 932                 }
 933                 buf_size += priv->frag_info[i].frag_size;
 934                 i++;
 935         }
 936
 937         priv->num_frags = i;
 938         priv->rx_skb_size = eff_mtu;
 939         priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct mlx4_en_rx_alloc));
 940
 941         en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d "
 942                   "num_frags:%d):\n", eff_mtu, priv->num_frags);
 943         for (i = 0; i < priv->num_frags; i++) {
 944                 en_err(priv,
 945                        "  frag:%d - size:%d prefix:%d align:%d stride:%d\n",
 946                        i,
 947                        priv->frag_info[i].frag_size,
 948                        priv->frag_info[i].frag_prefix_size,
 949                        priv->frag_info[i].frag_align,
 950                        priv->frag_info[i].frag_stride);
 951         }
 952 }
 953
 954 /* RSS related functions */
 955
 956 static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
 957                                  struct mlx4_en_rx_ring *ring,
 958                                  enum mlx4_qp_state *state,
 959                                  struct mlx4_qp *qp)
 960 {
 961         struct mlx4_en_dev *mdev = priv->mdev;
 962         struct mlx4_qp_context *context;
 963         int err = 0;
 964
 965         context = kmalloc(sizeof(*context), GFP_KERNEL);
 966         if (!context)
 967                 return -ENOMEM;
 968
 969         err = mlx4_qp_alloc(mdev->dev, qpn, qp);
 970         if (err) {
 971                 en_err(priv, "Failed to allocate qp #%x\n", qpn);
 972                 goto out;
 973         }
 974         qp->event = mlx4_en_sqp_event;
 975
 976         memset(context, 0, sizeof *context);
 977         mlx4_en_fill_qp_context(priv, ring->actual_size, ring->stride, 0, 0,
 978                                 qpn, ring->cqn, -1, context);
 979         context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma);
 980
 981         /* Cancel FCS removal if FW allows */
 982         if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP) {
 983                 context->param3 |= cpu_to_be32(1 << 29);
 984                 ring->fcs_del = ETH_FCS_LEN;
 985         } else
 986                 ring->fcs_del = 0;
 987
 988         err = mlx4_qp_to_ready(mdev->dev, &ring->wqres.mtt, context, qp, state);
 989         if (err) {
 990                 mlx4_qp_remove(mdev->dev, qp);
 991                 mlx4_qp_free(mdev->dev, qp);
 992         }
 993         mlx4_en_update_rx_prod_db(ring);
 994 out:
 995         kfree(context);
 996         return err;
 997 }
 998
 999 int mlx4_en_create_drop_qp(struct mlx4_en_priv *priv)
1000 {
1001         int err;
1002         u32 qpn;
1003
1004         err = mlx4_qp_reserve_range(priv->mdev->dev, 1, 1, &qpn);
1005         if (err) {
1006                 en_err(priv, "Failed reserving drop qpn\n");
1007                 return err;
1008         }
1009         err = mlx4_qp_alloc(priv->mdev->dev, qpn, &priv->drop_qp);
1010         if (err) {
1011                 en_err(priv, "Failed allocating drop qp\n");
1012                 mlx4_qp_release_range(priv->mdev->dev, qpn, 1);
1013                 return err;
1014         }
1015
1016         return 0;
1017 }
1018
1019 void mlx4_en_destroy_drop_qp(struct mlx4_en_priv *priv)
1020 {
1021         u32 qpn;
1022
1023         qpn = priv->drop_qp.qpn;
1024         mlx4_qp_remove(priv->mdev->dev, &priv->drop_qp);
1025         mlx4_qp_free(priv->mdev->dev, &priv->drop_qp);
1026         mlx4_qp_release_range(priv->mdev->dev, qpn, 1);
1027 }
1028
1029 /* Allocate rx qp's and configure them according to rss map */
1030 int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
1031 {
1032         struct mlx4_en_dev *mdev = priv->mdev;
1033         struct mlx4_en_rss_map *rss_map = &priv->rss_map;
1034         struct mlx4_qp_context context;
1035         struct mlx4_rss_context *rss_context;
1036         int rss_rings;
1037         void *ptr;
1038         u8 rss_mask = (MLX4_RSS_IPV4 | MLX4_RSS_TCP_IPV4 | MLX4_RSS_IPV6 |
1039                         MLX4_RSS_TCP_IPV6);
1040         int i, qpn;
1041         int err = 0;
1042         int good_qps = 0;
1043         static const u32 rsskey[10] = { 0xD181C62C, 0xF7F4DB5B, 0x1983A2FC,
1044                                 0x943E1ADB, 0xD9389E6B, 0xD1039C2C, 0xA74499AD,
1045                                 0x593D56D9, 0xF3253C06, 0x2ADC1FFC};
1046
1047         en_dbg(DRV, priv, "Configuring rss steering\n");
1048         err = mlx4_qp_reserve_range(mdev->dev, priv->rx_ring_num,
1049                                     priv->rx_ring_num,
1050                                     &rss_map->base_qpn);
1051         if (err) {
1052                 en_err(priv, "Failed reserving %d qps\n", priv->rx_ring_num);
1053                 return err;
1054         }
1055
1056         for (i = 0; i < priv->rx_ring_num; i++) {
1057                 qpn = rss_map->base_qpn + i;
1058                 err = mlx4_en_config_rss_qp(priv, qpn, priv->rx_ring[i],
1059                                             &rss_map->state[i],
1060                                             &rss_map->qps[i]);
1061                 if (err)
1062                         goto rss_err;
1063
1064                 ++good_qps;
1065         }
1066
1067         /* Configure RSS indirection qp */
1068         err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, &rss_map->indir_qp);
1069         if (err) {
1070                 en_err(priv, "Failed to allocate RSS indirection QP\n");
1071                 goto rss_err;
1072         }
1073         rss_map->indir_qp.event = mlx4_en_sqp_event;
1074         mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn,
1075                                 priv->rx_ring[0]->cqn, -1, &context);
1076
1077         if (!priv->prof->rss_rings || priv->prof->rss_rings > priv->rx_ring_num)
1078                 rss_rings = priv->rx_ring_num;
1079         else
1080                 rss_rings = priv->prof->rss_rings;
1081
1082         ptr = ((void *) &context) + offsetof(struct mlx4_qp_context, pri_path)
1083                                         + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH;
1084         rss_context = ptr;
1085         rss_context->base_qpn = cpu_to_be32(ilog2(rss_rings) << 24 |
1086                                             (rss_map->base_qpn));
1087         rss_context->default_qpn = cpu_to_be32(rss_map->base_qpn);
1088         if (priv->mdev->profile.udp_rss) {
1089                 rss_mask |=  MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6;
1090                 rss_context->base_qpn_udp = rss_context->default_qpn;
1091         }
1092
1093         if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
1094                 en_info(priv, "Setting RSS context tunnel type to RSS on inner headers\n");
1095                 rss_mask |= MLX4_RSS_BY_INNER_HEADERS;
1096         }
1097
1098         rss_context->flags = rss_mask;
1099         rss_context->hash_fn = MLX4_RSS_HASH_TOP;
1100         for (i = 0; i < 10; i++)
1101                 rss_context->rss_key[i] = cpu_to_be32(rsskey[i]);
1102
1103         err = mlx4_qp_to_ready(mdev->dev, &priv->res.mtt, &context,
1104                                &rss_map->indir_qp, &rss_map->indir_state);
1105         if (err)
1106                 goto indir_err;
1107
1108         return 0;
1109
1110 indir_err:
1111         mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
1112                        MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
1113         mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
1114         mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
1115 rss_err:
1116         for (i = 0; i < good_qps; i++) {
1117                 mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
1118                                MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
1119                 mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
1120                 mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
1121         }
1122         mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
1123         return err;
1124 }
1125
1126 void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv)
1127 {
1128         struct mlx4_en_dev *mdev = priv->mdev;
1129         struct mlx4_en_rss_map *rss_map = &priv->rss_map;
1130         int i;
1131
1132         mlx4_qp_modify(mdev->dev, NULL, rss_map->indir_state,
1133                        MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->indir_qp);
1134         mlx4_qp_remove(mdev->dev, &rss_map->indir_qp);
1135         mlx4_qp_free(mdev->dev, &rss_map->indir_qp);
1136
1137         for (i = 0; i < priv->rx_ring_num; i++) {
1138                 mlx4_qp_modify(mdev->dev, NULL, rss_map->state[i],
1139                                MLX4_QP_STATE_RST, NULL, 0, 0, &rss_map->qps[i]);
1140                 mlx4_qp_remove(mdev->dev, &rss_map->qps[i]);
1141                 mlx4_qp_free(mdev->dev, &rss_map->qps[i]);
1142         }
1143         mlx4_qp_release_range(mdev->dev, rss_map->base_qpn, priv->rx_ring_num);
1144 }